One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,10,6,7,4,9)(3,11,12,15,13,16,14,8)(17,18)(19,25,28,22)(20,29)(21,23)(24,31)(26,30,32,27)(2,7)(4,5)(11,16)(12,14)(17,18)(19,26)(20,29)(21,23)(22,27)(24,31)(25,30)(28,32) involution — undirected(1,3)(2,8,7,15)(4,12)(5,14)(6,13)(9,11,10,16)(17,19)(18,22)(20,30)(21,28)(23,25)(24,32)(26,29)(27,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.